If you really persist in these three months, I think you can achieve the expected results. First of all, pay attention to the reasonable collocation of three meals in diet, and try not to eat white rice and white flour. The staple food can be replaced by corn, sweet potato, purple potato and pumpkin. Don't eat fried greasy food, you can eat some light food, such as chicken, fish, beans, vegetables, fruits and other foods with low sugar content. What about every meal?